package my.util;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
import org.apache.commons.httpclient.methods.multipart.Part;
/**
 * 发送http请求的工具包
 * @author xsw
 * @date 2017-7-11
 */
public class HttpRequest {
	public static final String DEF_CHATSET = "UTF-8";
    public static final int DEF_CONN_TIMEOUT = 30000;
    public static final int DEF_READ_TIMEOUT = 30000;
    public static String userAgent =  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
 
    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url) {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try {
            String urlNameString = url ;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //connection.setRequestProperty("Charset", "utf-8");
            connection.setRequestProperty("content-type", "text/html;charset=utf-8");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                //System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result .append( line);
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
         BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //conn.setRequestProperty("Charset", "utf-8");
            conn.setRequestProperty("content-type", "text/html;charset=utf-8");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "UTF-8"));
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result.toString();
    }
    /**
    * 
    * @param strUrl 请求地址
    * @param params 请求参数
    * @param method 请求方法 GET 或 POST
    * @return  网络请求字符串
    * @throws Exception
    */
   public static String net(String strUrl, Map params,String method) throws Exception {
       HttpURLConnection conn = null;
       BufferedReader reader = null;
       String rs = null;
       try {
           StringBuffer sb = new StringBuffer();
           if(method==null || method.equals("GET")){
               strUrl = strUrl+"?"+urlencode(params);
           }
           URL url = new URL(strUrl);
           conn = (HttpURLConnection) url.openConnection();
           if(method==null || method.equals("GET")){
               conn.setRequestMethod("GET");
           }else{
               conn.setRequestMethod("POST");
               conn.setDoOutput(true);
           }
           conn.setRequestProperty("User-agent", userAgent);
           conn.setUseCaches(false);
           conn.setConnectTimeout(DEF_CONN_TIMEOUT);
           conn.setReadTimeout(DEF_READ_TIMEOUT);
           conn.setInstanceFollowRedirects(false);
           conn.connect();
           if (params!= null && method.equals("POST")) {
               try {
                   DataOutputStream out = new DataOutputStream(conn.getOutputStream());
                       out.writeBytes(urlencode(params));
               } catch (Exception e) {
                   // TODO: handle exception
               }
           }
           InputStream is = conn.getInputStream();
           reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
           String strRead = null;
           while ((strRead = reader.readLine()) != null) {
               sb.append(strRead);
           }
           rs = sb.toString();
       } catch (IOException e) {
           e.printStackTrace();
       } finally {
           if (reader != null) {
               reader.close();
           }
           if (conn != null) {
               conn.disconnect();
           }
       }
       return rs;
   }

   /**
    * 将map型转为请求参数型
    * @param data
    * @return
    */
   public static String urlencode(Map<String,Object>data) {
       StringBuilder sb = new StringBuilder();
       for (Map.Entry i : data.entrySet()) {
           try {
               sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
           } catch (UnsupportedEncodingException e) {
               e.printStackTrace();
           }
       }
       return sb.toString();
   }
   
   /**
	 * 可设置请求头的get方法
	 * @param url
	 * @param headers
	 */
	public static String get(String url, Map<String, String> headers) {
		int connectTimeout = 5000;
		int readTimeout = 10000;

		//如果url为空的话就不发送请求
		if (url == null || url.trim().length() <= 0) {
			return null;
		}

		BufferedReader in = null;;
		GetMethod pm = new GetMethod(url);
		StringBuilder content = new StringBuilder();
		HttpClient client = new HttpClient();
		
		for (Entry<String, String> header : headers.entrySet()) {
			pm.addRequestHeader(header.getKey(), header.getValue());
		}
		
		client.getHttpConnectionManager().getParams().setConnectionTimeout(connectTimeout);
		pm.getParams().setParameter("http.socket.timeout", Integer.valueOf(readTimeout));
		
		try {
			int stateCode = client.executeMethod(pm);
			if (stateCode == 200) {
				in = new BufferedReader(new InputStreamReader(pm.getResponseBodyAsStream(), "UTF-8"));
				String line = "";
				String NL = System.getProperty("line.separator");
				while ((line = in.readLine()) != null) {
					content.append((new StringBuilder(String.valueOf(line))).append(NL).toString());
				}
			}
			System.out.println("Http Get Success! " + "Url: " + url);
		} catch (Exception e) {
			System.out.println("\n****************************************");
			System.out.println("Http Get Fail!\n" + "Url: " + url + "\n" + e.getMessage() + "");
			System.out.println("****************************************\n");
		}
		
		if (in != null) {
			try {
				in.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
		}

		return content.toString();
	}
	
	/**
	 * 可设置请求头的post方法
	 * @param url
	 * @param param
	 * @param headers
	 */
	public static String post(String url, Object param, Map<String, String> headers) {
		int connectTimeout = 10000;
		int readTimeout = 300000;
		//如果url为空的话就不发送请求
		if (url == null || url.trim().length() <= 0) {
			return null;
		}

		BufferedReader in = null;;
		PostMethod pm = new PostMethod(url);
		StringBuilder content = new StringBuilder();
		HttpClient client = new HttpClient();
		
		for (Entry<String, String> header : headers.entrySet()) {
			pm.addRequestHeader(header.getKey(), header.getValue());
		}		
		
		if(param instanceof String) {
			pm.setRequestBody((String) param);
		} 
		else if(param instanceof byte[]) {
			pm.setRequestEntity( new ByteArrayRequestEntity((byte[]) param) ); 
		}
		else if(param instanceof Part[]) {
			MultipartRequestEntity entity = new MultipartRequestEntity((Part[])param, pm.getParams());
			pm.setRequestEntity(entity); 
		}
		else if(param instanceof RequestEntity) {
			pm.setRequestEntity( (RequestEntity)param ); 
		}
			
		client.getHttpConnectionManager().getParams().setConnectionTimeout(connectTimeout);
		pm.getParams().setParameter("http.socket.timeout", Integer.valueOf(readTimeout));
		
		try {
			int stateCode = client.executeMethod(pm);
//			if (stateCode == 200) {
				in = new BufferedReader(new InputStreamReader(pm.getResponseBodyAsStream(), "UTF-8"));
				String line = "";
				String NL = System.getProperty("line.separator");
				while ((line = in.readLine()) != null) {
					content.append((new StringBuilder(String.valueOf(line))).append(NL).toString());
				}
//			}
			System.out.println("Http Post Success! " + "Url: " + url);
		} catch (Exception e) {
			System.out.println("\n****************************************");
			System.out.println("Http Post Fail!\n" + "Url: " + url + "\n" + e.getMessage() + "");
			System.out.println("****************************************\n");
		}
		
		if (in != null) {
			try {
				in.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
		}

		return content.toString();
	}
	

	   /**
		 * 将url进行url编码
		 * @param url
		 */
		public static String encode(String url) {
			String urlEncode = null;
			try {
				urlEncode = java.net.URLEncoder.encode(url, "utf8");
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
			if (urlEncode != null) {
				return urlEncode;
			} else {
				return url;
			}
		}
		
		/**
		 * 将url进行url解码
		 * @param url
		 */
		public static String decode(String url) {
			String urlDecode = null;
			try {
				urlDecode = java.net.URLDecoder.decode(url, "utf8");
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
			if (urlDecode != null) {
				return urlDecode;
			} else {
				return url;
			}
		}
}